username parsing for fa+ users

app/lib/domain/fa/parser/user_page_helper.rb

@@ -42,7 +42,12 @@ class Domain::Fa::Parser::UserPageHelper < Domain::Fa::Parser::Base
           elsif PREFIXES.include?(name[0])
             name[1..]
           else
-            raise("invalid prefix for name: #{name}")
+            if @elem.css("img.userIcon.faplus-icon")
+              # FA+ users have no prefix
+              name
+            else
+              raise("invalid prefix for name: #{name}")
+            end
           end
         end
       end

spec/lib/domain/fa/parser/redux_page_spec.rb

@@ -356,11 +356,19 @@ describe Domain::Fa::Parser::Page do
     ]
   end
 
+  it "works with FA+ users" do
+    parser = get_parser("marzimoo_user_page.html")
+    assert_page_type parser, :probably_user_page?
+    up = parser.user_page
+    assert_equal up.name, "MarziMoo"
+    assert_equal up.registered_since, DateTime.parse("Sep 7, 2018 06:19")
+  end
+
   def get_parser(file, require_logged_in: true)
     path = File.join("domain/fa/parser/redux", file)
     contents = SpecUtil.read_fixture_file(path) || raise("Couldn't open #{path}")
-    page = Domain::Fa::Parser::Page.new(contents, require_logged_in: require_logged_in)
-    assert_equal Domain::Fa::Parser::Page::VERSION_2, page.page_version, "page version mismatch for file #{file}"
-    page
+    parser = Domain::Fa::Parser::Page.new(contents, require_logged_in: require_logged_in)
+    assert_equal Domain::Fa::Parser::Page::VERSION_2, parser.page_version, "parser version mismatch for file #{file}"
+    parser
   end
 end